Ontario Geological Survey
Permanent Link to this Record:
MDI52F03NW00005
| Record Name(s) | Bolen - 1991 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Mar-02 |
| Date Last Modified | 2022-Jul-07 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Bluffpoint Lake Area
Latitude: 49° 8' 50.33" Longitude: -93° 23' 7.4"
UTM Zone: 15 Easting: 471895.005 Northing: 5443903.685 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52F03NW
Point Location Description: Transfer
Location Method: Conversion from MDI
Access Description: The property consists of 33 claims in the Kenora Mining District. The property is accessible via the Cedar Narrows Road, a distance of 42 kilometres from its junction with Highway 502. The Cedar Narrows Road is maintained all year round by Boise Cascade, to service their pulp cutting operations. (J. Bolen, Assessment File F/3 NW Q-1, p. 2, Kenora Resident Geologist Office)
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.8848 / 52F03NW Q-1 | 52F03NW0021 | 52F03NW0021 |
Province: Superior
Subprovince: Wabigoon
Terrane: Western Wabigoon
Belt: Eagle-Wabigoon-Manitou
Geological Age: Precambrian
Jul 07, 2022 (C Ravnaas) - All bedrock in the map area is Early Precambrian (Archean) in age. The southern boundary of the property lies 1.6 kilometres north of the east trending Manitou Stretch - Pipestone Lake Fault. Supracrustal rocks consist of interlayered, steeply dipping, tightly folded andesitic flows and pyroclastics with lesser amounts of mafic and felsic metavolcanics. The metavolcanics in the map area lie in a strong pinch zone between the Pipestone Lake Fault and the Lawrence Batholith. A widespread schistosity and shearing has been developed, most strongly along the axial trace of fold hinges. The composite Lawrence Lake Batholith consists mainly of altered biotite-hornblende diorite and quartz diorite, with a later quartz rlch hornblende biotite trondhjemite. The batholith has intruded the the metavolcanics causing deformation and metasomitizing the contact rocks. Two major shear zones (B&C) have been identified radiating from the Lawrence Lake Batholith, to intersect the sheared hinge line of the one identified fold axis found on the property. These shears from the batholith are generally believed to be the main channel ways for gold mineralization in the Straw Lake area. (J. Bolen, Assessment File F/3 NW Q-1, p. 2-9, Kenora Resident Geologist Office)
Feb 19, 2010 (C Ravnaas) - Ontario Geological Survey Report 22; Geology of the Straw Lake Area, Edwards, G.R. under "Suggestions for Exploration", states "Emphasis should be put on structural control of mineralization and hydro-thermal activity related to emplacement of the Lawrence Lake Batholith. The fact that four main gold occurrences in the vicinity at Straw Lake occur in different rock types supports a hydrothermal origin for gold in this vicinity. Also it was found by the author (Edwards) that some outcrops along the south shore of Straw Lake near the Straw Lake Occurrence contain a fracture cleavage trending North-North East to North-East direction, almost perpendicular to normal east striking schistosity of the adjacent outcrops. Two northeast trending photo lineaments located in the pyrite rich trondhjemite border subphase of the Lawrence Lake Batholith strike toward the mine area and may be related to the cross cleavage which subsequently could have been avenues for mineralization"
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 5 | Pyrite | Economic | Ore |
Feb 19, 2010 (C Ravnaas) - Best assay: 1.30 opt Au from grab. To date there are 4 showings in the vicinity of Straw Lake with economic potential. (1) Grab samp1e by G.R. Edwards, OGS Report #222, 1983, assayed 0.54 oz/ton Au. This showing is within the Lawrence Lake Batholith and is presently part of the Fairservice Property which is under option to Falconbridge Copper Ltd with Drilling by Noranda and Selco. Recently Fa1conbridge has indicated sub economic grades. (2) Straw Lake Beach Mines - presently owned by Mindel Mines Ltd. A vein system in a shear in altered felsic volcanics, sericite schist. Production 'between 1940 and 1945 amounted to 11,568 oz Au and 1040 oz Ag from 33,662 tons of ore. The vein goes off the property to the north on to the Konigston Property beneath Straw Lake. (3) Konigston Property - owned by A.J. Eustace. A 3 metre wide shear zone in intermediate agglomerate. Limited work indicates 5,600 tons at 0.40 oz/ton Au in a zone 460' x6' x 25'. (4) Formerly the Johnston Claims, 1940 - 45, which were staked to provide protection for the Konigson Showing. This showing is located 1500 ft north of the Konigson Showing and consists of a quartz vein of 1 foot to 8 feet in width and a minimum 300 feet in length. Grab samples in the late 1930's and early 1940's from a blasted trench assayed up to 0.15 oz/ton Au. This vein lies on the 'A' shear zone and except for a limited amount of trenching has not had any work done on it. Four grab samples assayed 0.01, 0.03, 0.005 and Nil, respectively. (J. Bolen, Assessment File F/3 NW Q-1, p. 2-9, Kenora Resident Geologist Office)
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